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Mitsubishi Electric MELSEC-Q Series C Controller Module Denial of Service and Malicious Code Execution (CVE-2021-29998)

critical Tenable OT Security Plugin ID 501838

Version 1.3

Sep 21, 2026, 3:50 PM

  • Plugin metadata (detection updated)

Plugin Feed: 202609211550

Version 1.2

Dec 18, 2024, 6:42 PM

  • Plugin metadata (detection updated)

Plugin Feed: 202412181842

Version 1.1

Dec 19, 2023, 8:16 PM

  • CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:U/RL:OF/RC:C". "CVSSv3 temporal vector" set to "CVSS:3.0/E:U/RL:O/RC:C")
  • Exploit attributes ("Exploit available" set to "False". "Exploitability ease" set to "No known exploits are available")

Plugin Feed: 202312192016

Version 1.0

Dec 18, 2023, 6:12 PM

  • New

Plugin Feed: 202312181812

* Changelogs are generally available for changes made after Nov 1, 2022